Chris Molanphy breaks down the first quarter century of Billboard's Modern Rock chart-- from the Cure, to Nirvana, to Marcy Playground, to Linkin Park, to Incubus, to Phoenix-- finding an ever-shifting definition of what "alternative" means.

We sit down with Low's Alan Sparhawk to discuss his turbulent 2005, a year that saw him adjusting to the loss of longtime band member Zak Sally, altering his band's slowcore sound, and dealing with health problems.